Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1981-01-23
1983-12-20
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D1004
Patent
active
D02718600
REFERENCES:
patent: 1933409 (1933-10-01), Berman
patent: 2389817 (1945-11-01), Pond et al.
patent: 2708596 (1955-05-01), Weller
patent: 3188004 (1965-06-01), Falk
patent: 3246758 (1966-04-01), Wagner
patent: 3360128 (1967-12-01), Federline
patent: 3372807 (1968-03-01), Barnard
patent: 3748263 (1973-07-01), Stobe
patent: 4271016 (1981-06-01), Albertson
patent: 4333826 (1982-06-01), Albertson
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